Race condition in the msxml3 module in Microsoft XML Core Services 3.0, as used in Internet Explorer 6 and other applications, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via many nested tags in an XML document in an IFRAME, when synchronous document rendering is frequently disrupted with asynchronous events, as demonstrated using a JavaScript timer, which can trigger NULL pointer dereferences or memory corruption, aka "MSXML Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5793
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2008/ms08-069
http://www.vupen.com/english/advisories/2008/3111
http://www.us-cert.gov/cas/techalerts/TA08-316A.html
http://www.securityfocus.com/bid/21872
http://www.securityfocus.com/archive/1/456343/100/0/threaded
http://www.securityfocus.com/archive/1/455986/100/0/threaded
http://www.securityfocus.com/archive/1/455965/100/0/threaded
http://securitytracker.com/id?1021164
http://secunia.com/advisories/23655
http://seclists.org/fulldisclosure/2007/Jan/0110.html
http://marc.info/?l=bugtraq&m=122703006921213&w=2
http://isc.sans.org/diary.php?storyid=2004
http://archives.neohapsis.com/archives/fulldisclosure/2007-01/0113.html